To see the holiday boot-up screen with animals and snow and Christmas Trees, all you need to do is to re-boot your Moto X or Moto G. The phone you use has to be running Android 4.4. Or, install the Motorola Boot Services app from the Google Play Store and it will also update the boot animation. The holiday boot animation is expected to stay on the phones until January 6th. After that date, Motorola will switch the boot animation to something new, or revert back to the old pre-holiday animation.
Motorola and Google have started offering many features for their top-line models directly from the Google Play Store.This way, the latest updated version can always be ready,waiting to be installed by a Motorola customer without having to wait for those meddling kids slow as molasses carriers to test even the most minor of updates.
source: Waiflih via MotorolaBootServices via GottaBeMobile